13. g1h2 A good prophylactic move, reminiscent of Anatoly Karpov. White reinforces the pawn on h3 before it's even attacked. 13... a8b8 A bad decision. This is definitely not the most useful move available. 14. d1c2 It's unclear whether this is the best square for the queen. 14... f8e8  15. c3b5 